Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 24760: 3(x-6)+4=5(x+2)-8
Click here to see answer by Alwayscheerful(414)

Question 24770: Having trouble with this one. This is as far as I got in solving this literal equation:
Solve:S=2wh+2wl+2lh,solve for h
S-2wh-2wl=2lh
but then I got confused because the answer is h= s-2wl/2w+2l
Can you please help me figure out how they got to this answer?

Click here to see answer by longjonsilver(2297)

Question 24769: Having trouble solving this one because the answer is n=pv/rt
PV=nRT, solve for t
Can you help solve or is this a typo? Solving for t but answer is n=?
Click here to see answer by longjonsilver(2297)

Question 24791: Im not sure what I did wrong because my signs are different than the answers.
equation a(p-3t)=d, solve for t
I did:
ap-3ta=d
-3ta=d-ap
my answer: t= d-ap/-3a
the answer: t=ap-d/3a
Why do the signs change and does the order of the terms have to be in a certain order?

Click here to see answer by stanbon(75887)

Question 24814: A computer repair bill was $225. This included $75 for parts and $50 for each hour of labor. Find the number of hours of labor.
Click here to see answer by Paul(988)

Question 24814: A computer repair bill was $225. This included $75 for parts and $50 for each hour of labor. Find the number of hours of labor.
Click here to see answer by chripchrip(6)

Question 24817: A sailing race takes place on a 300m course. The second leg of the course is 100 m
longer that the first and the third leg is 100 m longer than the second. How long is the second leg?
Neil is 4 years older that Andrea If Neil was twice as old as Andrea four years ago how old was Andrea?
Twicw the sum of two consecutive integers is 42. What are the two integers?
Click here to see answer by Paul(988)

Question 24807: How do I do Elimination using multiplication. I'm in the 9th grade my book is the Glencoe Mathematics Algebra 1. Can you please help me and e-mailme back explaining this to me in detail thanks ALOT this website is very helpful and agai thanks alot. from Christina 1-18-06 PLEASE EXPLAIN VERY DETAILED thanks.

Click here to see answer by elima(1433)

Question 24804: How do I do Elimination using Multiplacation? It is a bunch of numbers and letters with signs and I don't understand it at all. Can you help me?
Click here to see answer by elima(1433)

Question 24824: Help me!!! 7+6z=8z-13
Click here to see answer by elima(1433)

Question 24835: x^y=343 and x and y are integers between 1 and 10. Find x and y.
Click here to see answer by Earlsdon(6294)

Question 24723: what is (3x to the 3th power) (5x to the 10th power)
Click here to see answer by Earlsdon(6294)

Question 24825: 12p=6-3p
Click here to see answer by elima(1433)

Question 24843: 3/8x=1
Click here to see answer by Alwayscheerful(414)

Question 24826: 5/6t+4=2-1/6t
Click here to see answer by Alwayscheerful(414)

Question 24820: 4/3u-6=7/3u+8
Click here to see answer by Alwayscheerful(414)

Question 24869: Its me again. I am having trouble with this equation
w=(ma+kx)d, solve for x when the answer is x=w-mad/kd
I tried breaking down the equation but started with w-ma-d=kx
are you supposed to multiply by d even though its attached to the back? Can you please show me how this should be solved?
Click here to see answer by rapaljer(4671)

Question 24922: Hi. I'm trying to help a friends little sister with her homework but is been so long since Ive done this stuff I want to check my answer to make sure its right. the question is f + 3 11/12=18. Anyone who can help, it would be greatly appreciated.
Click here to see answer by josmiceli(19441)

Question 24943: I'm having difficulty figuring out the equation for this word problem from our variable equation unit:
A truck leaves a rest stop traveling at a steady rate of 56 mph. A car leaves the same rest stop 1/4 hour later, following the truck at a steady rate of 64mph. How long after the truck leaves the rest stop, will the car overtake the truck? Thank you!
Click here to see answer by Paul(988)

Question 24961: 3/x-1=5/4x-1/3x
Click here to see answer by quentin252(19)

Question 24972: I rcvd an answer to this problem earlier (24882) but the steps and the reason why are still not clear to me. This was not taught to us as a formula, but just as a regular equation. So I am not sure why you would reverse the fraction instead of multiplying everything by 5 to remove the fraction
HELP!!!
F=9/5c+32, solve for C
Click here to see answer by AnlytcPhil(1806)

Question 24978: how do you aad 2x+3y+7x+8y?
Click here to see answer by stanbon(75887)

Question 24983: How do you work out 3(y+2)=24
Click here to see answer by queenofit(120)

Question 24960: (2x^2+4y^4)/(x^2+2y^2)
Click here to see answer by rapaljer(4671)

Question 25073: how do i work out this simultaneous equation?

2x-y=4
2y+x=7
Click here to see answer by Earlsdon(6294)

Question 25078: what is the product of the first 99 terms in the sequence 1/2 2/3 3/4 4/5..?

Click here to see answer by Earlsdon(6294)

Question 25078: what is the product of the first 99 terms in the sequence 1/2 2/3 3/4 4/5..?

Click here to see answer by venugopalramana(3286)

Question 25077: What is the product of the first 99 products in the sequence 1/2 2/3 3/4 4/5...?
Click here to see answer by venugopalramana(3286)

Question 25077: What is the product of the first 99 products in the sequence 1/2 2/3 3/4 4/5...?
Click here to see answer by askmemath(368)

Question 25114: I am a parent trying to help my 8th grader. Could you please help me explain how to work this equation: 4(5c+3)-3(4c-6)=110......I think it would be
20c+12-12c+18=110 but then what do we do?
Click here to see answer by Linz(9)

Question 25262: I am a parent trying to help a 7th grader: how can I explain:
r-7 = 13
Thanks
DAwn
Click here to see answer by Earlsdon(6294)

Question 25277: Hello,
I am really struggling with a few of these equations, could you please help me out here and explain how you solved the problem? Thank you very much for your help and assistance with this matter.
Dad of 5!
1. -4+46=7(-3t+6)
2. -4(3b+9)=24+3(2b-8)
Click here to see answer by askmemath(368)

Question 25281: Solve & show steps:
5x - 5 = 3x - 7 + 2(x + 1)
Click here to see answer by stanbon(75887)

Question 25281: Solve & show steps:
5x - 5 = 3x - 7 + 2(x + 1)
Click here to see answer by AnlytcPhil(1806)

Question 25297: 21y=-7
Click here to see answer by elima(1433)

Question 25336: I whant to calcule the limit of this equation wen it tends to +infinit
lim x--> +oo(2x-1)/((4x^2+1)^1/2-(x^2-1)^1/2)
Click here to see answer by kev82(151)

Question 25372: what does it mean say if 1\9y=20? I am really struggling with this sort of problem.
Click here to see answer by rapaljer(4671)

Question 25394: please help me with this equations:1/2(x+8)=7

Click here to see answer by Died2Soon(6)

Question 25349: 3.1a - 1.8= 1.7a + 5.9
Click here to see answer by elima(1433)

Question 25231: 40=.5h(15) solve for h
Click here to see answer by elima(1433)

Question 25434: 5(x-4)=2(x+1)-7
Click here to see answer by bacos(9)

Question 25574: Evaluate this numerical expression.
14+9x2
Click here to see answer by stanbon(75887)

Question 25583: 11x-6-4x+1=9x-8-2x+12
Click here to see answer by soccerdude716(1)

Question 25582: [6(x+4)-12]-5(x-8)+14]
Click here to see answer by longjonsilver(2297)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 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7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 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20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240, 30241..30285, 30286..30330, 30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 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39916..39960, 39961..40005, 40006..40050, 40051..40095, 40096..40140, 40141..40185, 40186..40230, 40231..40275, 40276..40320, 40321..40365, 40366..40410, 40411..40455, 40456..40500, 40501..40545, 40546..40590, 40591..40635, 40636..40680, 40681..40725, 40726..40770, 40771..40815, 40816..40860, 40861..40905, 40906..40950, 40951..40995, 40996..41040, 41041..41085, 41086..41130, 41131..41175, 41176..41220, 41221..41265, 41266..41310, 41311..41355, 41356..41400, 41401..41445, 41446..41490, 41491..41535, 41536..41580